C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  protecting access to std::map          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Shea Martin Guest Posted: Mon Sep 29, 2003 6:16 pm    Post subject: protecting access to std::map I have multiple threads that need access to single std::map. Currently I am using mutex's to regulate ANY access to the list. My questionion is, is it safe to have multiple threads READING the list at the same time, so long as they don't alter it? ~S Back to top joe@invalid.address Guest Posted: Mon Sep 29, 2003 6:23 pm    Post subject: Re: protecting access to std::map Shea Martin <smartin (AT) arcis (DOT) com> writes: Quote: I have multiple threads that need access to single std::map. Currently I am using mutex's to regulate ANY access to the list. My questionion is, is it safe to have multiple threads READING the list at the same time, so long as they don't alter it? Theoretically, unless there's a thread writing to it as well. Try posting this question to comp.programming.threads Joe Back to top Fletcher Glenn Guest Posted: Mon Sep 29, 2003 11:52 pm    Post subject: Re: protecting access to std::map [email]joe (AT) invalid (DOT) addr[/email]ess wrote: Quote: Shea Martin <smartin (AT) arcis (DOT) com> writes: I have multiple threads that need access to single std::map. Currently I am using mutex's to regulate ANY access to the list. My questionion is, is it safe to have multiple threads READING the list at the same time, so long as they don't alter it? Theoretically, unless there's a thread writing to it as well. Try posting this question to comp.programming.threads Joe I would have to agree with this answer. Many std::map's are implemented as an AVL tree under the covers. It would not do to well to be doing a read-only walk down a tree when the pointers begin shifting around. -- Fletcher Glenn Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.